First, schools generally have their own official website. You can go to official website, your alma mater, and see if you can find relevant information. You can also go to the archives management office of your alma mater, or find the contact information of your alma mater and call for advice. Even if the archives are no longer at the alma mater, you can learn about the whereabouts of the archives after graduation at the alma mater.

Second, you can call the local education bureau, human resources and social security bureau and other institutions to make inquiries. The Education Bureau provides online inquiry channels, and you can inquire your own files through official website. If you need physical files, you need to ask the relevant departments. Most schools will send students' files to the talent market where graduates are registered for preservation after graduation. You can check it in the local talent market.